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MECHANISM FOR SUPPOR AND OF KNITTING (No Model.) 4 Sheets-Sheet 1.

MP KINS.

ADJUSTING THE BURR HOLDERS MACHINES. Patented O0t. 28, 1884.

Witnesses.-

fidflb/kaszr A. & I. TOMPKINS. MECHANISM FOR SUPPORTING AND ADJUSTINGTHE BURR HOLDERS 4 Sheets-Sheet 2..

(No Model.)

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A A. &1. TOMPKINS. MECHANISM FOR SUPPORTING AND ADJUSTING THE BURRHOLDERS OF KNITTING MACHINES. No. 307,152. Patented 0013.28, 1884.

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A. & I. TOMPKINS. MECHANISM FOR SUPPORTING AND ADJUSTING THE BURRHOLDERS OP KNITTING MACHINES.

No. 307,152. Patented Oct. 28,1884.

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llNrTnn STATES PATENT Grinch.

ALBERT TOMPKTNS AND IRA TOMPKINS, OF TROY, NEW YORK.

MECHANISMFOR SUPPORTING AND ADJUSTING THE BURR-HOLDERS OFKNITTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 307,152, dated October28, 188%.

Application filed June .15, 1883. (No model.)

To all whom it may cmwern:

Be it known that we, ALBERT ToMrKINs and IRA TOMPKINS, of the city ofTroy,county of Rensselaer, and State of New York, have jointly inventeda new and useful Improvement in Mechanism for Supporting and Adjustingthe Burr-Holders of Knitting-Ma chines, of which the following is aspecification.

Our invention relates to means for adjust ably attaching burrholders ofa rotary knit ting-machine to the bottom ring-plate; and our inventionconsists in the novel construction and combination of parts hereinafterdescribed, and as specifically pointed out in the claim.

In knitting-machines of the kind to which our improvements areapplicable the brackets, heretofore used, and on which the pivotalhorizontal and vertical adjustment ofthe burrholders was produced, weremade permanent as a part of or as offsets from the plate-ring, or weresecured thereto, and consequently they had a fixed and arbitrary pointfrom which and on which the adjustments were had. As a sequence thepivotal adjustment for each burr-holder was obtained from one center,while the vertical and horizontal adjustments for each holder could beoperated but from one radial point with reference to the plate-ring. Themost delicate and accurate adjustment being required in devices of thiskind, our invention increases the facilities for obtaining it, as willsubsequently appear herein, and our invention furnishes a prompt andconvenient means for attaching and. detaching the brackets on which theburr adjustments are made to increase or diminish the number of burrsused.

In the accompanying drawings, forming a part of this specification,there are shown six figures illustrating our invention and the parts ofa rotary knitting-machine with which it connects, with the samedesignation of parts by letter reference used in all the illustrations.

Figure 1 shows a top view of the bottom platering of a rotaryknitting-machine with two of our adjustable brackets attached to thebottom ring and an adjustable burrholder attached to each of thebrackets. Fig. 2 illustrates in perspective one of the adj ustablebrackets and attached adjustable burrholder, with the parts shown asdetached from the plate-ring of the machine. Fig.- 3 shows alongitudinal vertical section taken centrally through the plate-ring ofthe machine, the vertical stud passing through the brackets, alsothrough the horizontal arm which sup ports the burr-ho1de1',and throughthe latter. Fig. 4 is a perspective of a modification of our invention.Fig. 5 illustrates a central longitudinal vertical section taken throughone of the brackets, the vertical stud-arm, and burrholder, as shown inFig. 2, but with the bottom ring rounded instead of flat, and. thebracket formed with a curved recess to-receive the ring, and theset-screw provided with a curved block to engage with the ring to holdthe bracket in place,.the same being a modification of our invention asrelating to the adjustable bracket. Fig. 6 is a perspective View of apart of a rotary knitting-machine having a part of the needles andfabric broken away to showthe position of the shaft and the bottom ringto which our improved bracket is attached.

The several parts of the mechanism thus illustrated are designated byletter reference and theirfunction explained as follows:

The letter H indicates the burr-holder, and R a horizontal arm or bar,to the outer end of which the burr-holder attaches.

The letter S designates a stud, which has arranged on its lower end thesleeve S for the horizontal passage of the rod, arm, or barR at a, and Nindicates a set-screw in the bottom of said sleeve, constructed toengage with the arm or bar, and to thus secure it within the sleeve whenhorizontally adjusted.

The letters B indicate the brackets,of which any number that can be puton theplate-ring may be used, and D designates a recess, that ishorizontally curved and made. in the bottom of the brackets to receivethe ring-plate of the knitting-machine.

The letter D in Figs. 4 and 5 indicates a modified form of recess, thatis made to curve horizontally, with curved or rounded-out verticalsurfaces to receive the bottom ring when the latter is rounded, asindicated in Fig. 5.

The letter 1? indicates the bottom ring of the machine, adapted to fitinto the recesses D.

The letter N designates a set-screw arranged in the bracket, and adaptedto engage with the ring to hold the bracket in place when adjusted at K,and as shown at Fig. 5. This set-screw is constructed with a curvedblock, K on its inner end, that engages with the ring and performs thesame office.

The letters A A designate upward-curved arms, that connect the hub Uwith thering on which the brackets are placed, and O inclicates thepassage-way made in the hub for the vertical shaft of the machine.

The letter a designates a vertical passageway made in the bracket B forthe vertical and pivotal movement of the stud S, so that with the studthus placed and guided it and the attached arm R and burr-holder H canbe moved around on the plate-ring of a knittingmachine.

The letter I designatesa vertically-arranged set-screw, one part ofwhich is threaded into each of the brackets, as indicated at a, and atits upper end reversely threaded into one end of the link-plate M,pivotally secured on top of the stud S, so that by means of the setscrewI the said stud, attached arm R, and burr-holder H may be moved upwardand downward for vertical adjustment, and held in place, when adjusted,by means of the setscrew N,which secures its pivotal adjustment as well.

By means of the modification shown in Fig. 5, in which the bottom ringof the knittingmachine is made round in its annular sectionalmeasurement as well as in its circumferential form, and the recess inthe under surface of the bracket and the engaging set-screw block aremade coincidently concave to fit the conversity of the ring, the bracketis made pivotally as well as radially adjustable thereon.

The plate-ring P is retained in the usual position below the needles ofthe knitting-machine, and it is constructed with the usual central huband opening,O,for the passage of the vertical shaft of the machine. Thusplaced, the brackets are made adjustable on the ring by means of therecesses formed in them to receive the ring, can be moved aroundthereon, and be secured in any desired position. They can be taken offor put on, and the number employed increased or decreased at will.

Having described our invention, what we claim is- In combination withthe ringplate P, the bracket B, formed with the recess D, andprovidedwith the set-screws N N and I, the stud S, adj ustably connectedwith the set screw I by the top plate, M, and provided with the sleeve Sand the arm R, provided with the holder H, substantially as and for thepurpose set forth.

Signed at Troy, New York, this 15th day of June, 1883, in the presenceof the two witnesses whose names are hereto annexed and by them written.

ALBERT TOMPKINS.

IRA TOMPKINS.

